# J. Heyn Jr.
**Wikidata**: [Q118430648](https://www.wikidata.org/wiki/Q118430648)  
**Source**: https://4ort.xyz/entity/j-heyn-jr-


## References

1. [Source](https://billiongraves.com/grave/Jan-Heijn/34024509?referrer=myheritage)
2. [Source](https://hdl.handle.net/21.12123/53911)
3. [Source](https://hdl.handle.net/21.12123/226635)
4. Virtual International Authority File
5. Integrated Authority File